Table 4.  Freight TSI - Percentage Changes Due to:,,,,
Date,"Changes
in Source Data","Changes
in Seasonal
Factors","Changes
in Weights/
Methodology",All Charges
Dec-06,1.33,-0.01,-0.52,0.79
Nov-06,1.33,-0.01,-0.55,0.76
Oct-06,1.30,0.05,-0.58,0.76
Sep-06,1.32,0.04,-0.85,0.51
Aug-06,1.34,-0.06,-0.54,0.73
Jul-06,1.29,-0.18,-0.45,0.66
Jun-06,1.46,-0.23,-0.47,0.74
May-06,1.48,-0.21,-0.55,0.70
Apr-06,1.02,-0.11,-0.53,0.38
Mar-06,0.61,-0.26,-0.58,-0.23
Feb-06,0.38,0.32,-0.51,0.20
Jan-06,0.00,0.60,-0.23,0.37
Dec-05,0.24,0.35,-0.60,-0.02
Nov-05,0.20,0.78,-0.37,0.61
Oct-05,0.24,-0.01,-0.40,-0.16
Sep-05,0.05,-0.09,-0.32,-0.36
Aug-05,0.32,-0.31,-0.50,-0.49
Jul-05,-0.23,-0.39,-0.59,-1.21
Jun-05,-0.27,-0.42,-0.53,-1.21
May-05,-0.52,-0.29,-0.50,-1.31
Apr-05,-0.41,-0.20,-0.47,-1.08
Mar-05,-0.50,0.10,-0.46,-0.85
Feb-05,-0.31,0.82,-0.43,0.08
Jan-05,-0.06,0.26,-0.48,-0.28
January 2005-December 2006,,,,
Average,0.48,0.02,-0.50,0.00
Minimum,-0.52,-0.42,-0.85,-1.31
  Date of Min,May-05,Jun-05,Sep-06,May-05
Maximum,1.48,0.82,-0.23,0.79
  Date of Max,May-06,Feb-05,Jan-06,Dec-06
Prior Years:,,,,
January 2002-December 2004,,,,
Average,-0.10,-0.01,-0.16,-0.27
Minimum,-0.63,-0.46,-0.47,-1.11
  Date of Min,Sep-04,Aug-03,Dec-04,Jun-04
Maximum,0.01,0.50,0.11,0.20
  Date of Max,Aug-04,Feb-04,Sep-02,Jan-02
January 1990-December 2001,,,,
Average,-0.01,-0.01,0.71,0.69
Minimum,-0.73,-0.40,-0.27,-0.43
  Date of Min,Mar-91,Aug-01,Jan-98,Oct-97
Maximum,0.11,0.26,2.84,3.01
  Date of Max,Mar-01,Mar-94,May-90,May-90
Source: Bureau of Transportation Statistics,,,,